*{
    padding: 0;
    margin: 0;
}
#main{
    width: 1900px;
    height: 800px;
    border: 1px;
}
.header{
    width: 100%;
    height: 80px;
    border: 1px;
}
.header iframe{
    width: 1900px;
    height: 80px;
}
.menu{
    width: 250px;
    height: 878px;
    float: left;
    background-color: #ffffff;
}
.menu .menu-lb{
    margin: 30px auto;
    width: 80%;
    height: 100px;
    text-align: center;
   
}
.byk{
    border: none !important;
}
.bs{
    color:#ffffff;
    background-color: #ff0000;
}
.content{
    width: 1650px;
    height: 878px;
    float: left;
    border: 0;
}